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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology

Species/Subspecies: Riemerella anatipestifer
Category: Causes hemolysis
Etymology: Genus name: named to honor Riemer, who first described Riemerella anatipestifer.
infections in geese in 1904
Species name: brings destruction of ducks.
Significance:Is due to high mortality of economic concern in countries with a large duck production. The disease has not been found in Sweden.
  [Of minor importance]   
Alternative Species Name(s):Moraxella anatipestifer, Pasteurella anatipestifer.
Type Strain: LMG 11054 = ATCC 11845 = CCUG 14215 = CCUG 21370 = NCTC 11014
Macromorphology (smell): Forms small convex butyrous and transparent colonies (1-2 mm in diameter). Some strains give hemolysis on blood agar.
Micromorphology: Thin rods (0.2-0.4 x 1-5 µm), which appear singly or in pairs. Are sometimes filamentous.
Gram +/Gram -:G-
Metabolism: Microaerophilic
Other Enzymes: Gelatinase + hippuricase + tryptophanase -, urease V
Fermentation of carbohydrates: Glucose -
Spec. Char.:
Disease:Infectious serositis or septicemia anserum exsudativa
Hosts: Duck (as well as goose, turkey and pheasants)
Clinical Picture: Nasal discharges, mild coughing and sneezing, tremors of the neck and head, as well as bad coordination during movement.
Genome Sequence:
Acc-noStrainSize (bp)Genome
CP002346 DSM 15868 2 155 121 1c + 0 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperonSequence similarity
U60101 ATCC 11845T 1 386 100% 

Two species have been described within the genus Riemerella, which is most closely related to the genera Bergeyella and Chryseobacterium. The genus Riemerella is also related to the genus Flavobacterium, which like the genus Riemerella belongs to the order Flavobacteriales.


New names of bacterial phyla

The taxonomic category phylum was previously not regulated by the International Code of Nomenclature of Prokaryotes (ICNP), but now this has changed and it was decided to revise the names of bacterial phyla. All phyla must be written in italics (which has been done on VetBact also before) and have the ending -ota.

Published 2023-03-01. Read more...
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Species within the family Chlamydiaceae were previously divided into two genera Chlamydia and Chlamydophila. However, the differences between these two genera were not that great and many research groups have not accepted this division. Therefore, the genus Chlamydophila has been returned to the genus Chlamydia and this change has now been incorporated in VetBact

Published 2023-03-15. Read more...

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